How to open a VS 2015 project?

Question

ASP.NET

Hello. I have a site on asp mvc 4, authorization there is simple member ship, it was written on vs 2012 professional like. Then I updated it to 2015 .... also professional ... then I installed 2015 community and the project stopped opening .... writes your project is not compatible with the current studio ....
What I just didn’t do, and the project file rules (I corrected the version ).
Maybe there is an opportunity to open a project with debug... so that the studio writes a detailed log.... to see which component does not allow opening?
#solution
Delete the .sln file and open the project in .csprog studio... And then just save the solution

Answer 1

So the studio writes logs and makes a backup when it converts. Here you can see them.